Complex metal compounds of azo



v in which a: has the meaning ascribed to-it above,

Patented Apr. 2, 1940 UNITED STATES mm; OFFICE COMPLEX IWETAL COMPOUNDS 0F AZO -DYESTUFFS Max Sfc'h mid, Riehen, Switzerland, assignor to the firm Society oi. Chemical Industry in Basle,

Basel, Switzerland No Drawing. Original application November 2,

1936, Serial No. 108,902. Divided and this application Februaryai, 1938, Serial No. 188.,804r In Switzerland November 6, 1935 12 Claims. (01. 260-147) This; application isa division of my applica-.

tion Serial No. 108,902, filed in the United States on November 2, 1936-, and in Switzerland on November 6, 1935.

This invention relates to new dyestuifs obtained from new intermediate products which are obtained themselves: by converting by known moth-- ods into the corresponding hydrazine a compound, I

f the g n ral formula i in, which a; is a diphenyl linking or a bridgesuch as -CH'=CH-, --CH2CH2,

. C I 0". H H or a heterocyclic ring such as I v =bydrogen or any substituent and the like; and R1 is: the residue of an organic.

acid... and; condensing in known manner, after saponifying the radicalof the organic acid, if this is present, with a suitable keto-compound to produce a pyrazolone capable of being coupled.

The new compounds, which correspond with the general formula R1 stands for hydrogen or a radical 01?; an organic acid and Py represents the pyrazolone radical,

can be; converted into new azo 'dyestufisieithera by coupling them with diam-compounds or by? v saqzlonifying any .radical of an organic: acid that.

tolidine,'dianisidine, diphenetidine, thio ether, 4:4'-diaminostilmay be, present, then diazotizing and. coupling I with coupling components or by using both reactions'together. I I

The new azo. dyestufis are characterized by the. presence of. the atom, grouping .in which Py and a: have the meaning ascribed to them above. and in which at least one azo-group is attached either to the pyrazolone radical or to the benzene nucleus which is not directly bound to the pyrazolone nucleus. They are par ticularly suitable for dyeing textiles consisting of or containing native or regenerated cellulose.

- The fastness of the dyeing may in many cases be improvedby after-treatment with agents yielding metals, whereby metal complexesare formed on the fiber. Such metal complexes may be pro-' ducedalso in the-'dye-bath, in substance, or during the formation of dyestufi.

As parent substancesfor compounds oi the general formula of the formua theremay be mentioned benzidine, diphenyline v placed by similar six-membered hetero rings containing carbon and nitrogen, such as those of the pyrimidine, the quinazoline, the phthalazine, and the like, which corresponds to products in which the linkage x can be formulated for example as Compounds of the general formula are therefore, for example, monoformylbenzidine, monoacetylbenzidine, i'nonobenzoylbenzidine, 4- or 3-acetylamino-1-(4- or 3'-amino)-benzoylaminobenzene, 4-amino-1-(4 or 3-acetylamino) benzoylaminobenzene-3-sulfonic acid, products obtained by monobenzoylation or monoacetylation from the reduced condensation products from 1 mol urea chloride or isocyanate from para- 0r meta-nitraniline and 1 mol 1:4-diaminobenzene-3-sulfonicwacid, such as OCH:

SOaH

the ternary condensation products from 1 mol 1:4- or 1:3-diaminobenzene-3- or -4-sulfonic acid, 1 mol monoacetyl-paraor meta-phenylenediamine and 1 mol of a primary or secondary amine and 1 mol cyanuric chloride such as H N H NH r q-o o-1 -r--1-ra.c0cm

c 1115- com 30:11 and the like.

Such pyrazolones are, for example, the following:

(IZOOH i )1 i I r CHz-C N N 11( azobenzene, diazonaphthalene, diazotoluene, di-

azoanisole, diazophenetole, diazotized aminoazobenzene or the like and sulfonic acids of them. Of particular interest are, however, the diazocompounds which have in orthoor peri-position to the diazo-group a hydroxyl group or a carboxyl group. Such diazo-compounds are, for example, those of ortho-aminophenols, orthoaminonaphthols and their sulfonic acids, the diazo-compounds of lz8-aminonaphthol sulfonic acids, also of ortho-aminocarboxylic acids, for instance anthranilic acid. With the aid of such compounds dyestuffs are obtained which can be converted into valuable metal compounds on the fiber or in substance by means of agents which yield metal, for instance copper salts, chromium salts or hydroxides of these metals.

Of these dyestuffs those are of especial value which are obtained by treating with copper on the fiber or in substance the azo dyestuffs which are themselves obtained by coupling the intermediate product of the general formula with a diazotized ortho-amino-carboxylic acid of the benzene series. These new, dyestufis are therefore the copper compounds of dyestuffs of the general formula in which R2 stands for an aromatic nucleus of the benzene series which carries a COOH-- group in ortho-position to the .-N==N-- group; when R1 f basic acid, these dyestuffs may be formulatedigenrama.

erally as follows:

These, new dyestufisare yellow to brown-yellow powders soluble in water toayellow solution: and; producing on cotton, whether dyed; as, such or producedon the-fiber by subsequenttreatment of. the non-metallized azo dyestuff with. an agent. yieldingcopper, yellow tintswhich are characterized. by; their excellent fastnessto light. correspond to,v the copper compounds of the--dyestufls of the general formula wherein. R stands for an aromatic nucleus ofIthe benzene series which is substituted in-ortho-position to-the N=N group by a COOH- group,

y stands for a member of the. group consisting of 1 H, methyl, phenyl, 0001-1 and C00- alkyl, x stands for a member of the group of linkages and a heterocyclic six-membered ring consisting of at least 3 and not exceeding 4 carbon atoms; and at least 2 and not exceeding Bnitrogen atoms, not more than 2 nitrogen atoms standing adjacent to each other, which ring further contains at-least twiceand not more than three times'the atom grouping wherein the groupdoes not. belong to the heterocyclic radical:,: and R1 stands for the radical of a polyvalent orv ganic acid. i The dyestuifs obtained by the'invention may, as already stated, especially be used for dyeing.

vegetable fibers. They may also be used with a" dine are stirred in fad-parts of water and some ice with 30 parts. of hydrochloric acid of specific Into this mixture there is. dropped.

like result for dyeing regenerated cellulose, for instance, viscose or copper silk. Should the new cluestuffs contain suitable substituents they may be diazotized on the fiber and developed by fur-v ther coupling components or by treatment with a diam-compound. When the dyestuffs have been made with the aid of ortho-aminophenols, orthoaminocarboxylic acids or their esters or ethers, or when they contain the salicylic acid grouping or other lake-forming groups of atoms they are capable of conversion into metal compounds. Suitable metals coming into qnestionbesides the copper and chromium already mentioned are nickel, cobalt, iron, zinc or the like; The. metal compounds may be obtained either on the fiber or insubstance. Y

The new. azo dyestuffs obtainable according to They formula in which R'stands fora nucleus selected, from the group consisting of aromatic" nuclei of" the benw ll.

zene and'naphthalene series; 31 standsfora member ofthe group consisting" of'I-I, methyl; phenyl. COOl-l and COO- alkyl, :0 standsfor 'a memberof the. group of" linkages consisting'of a diphenyl'- and; a heterocyclic six-membered: ring cons sting of at least 3 and not exceeding l carbon atoms,

oms, not more than 2. nitro en atoms.) standing adjacent to each other, which ring/further cone. .tains at least twice. and not more times the atom grouping than: three:

group does notbelongto the heterocyclic radical...

andz stands for a member of a group, of substitue ents linked to the benzene nucleusby N atomsand' consisting of a member of the group consistingof -N==N-R1, R1 standing for an aromatic nucleus from thegroup consisting of aromatic nuclei of the benzene and naphthalene series, and,

.. I-IIIR1 Rz standing for the radical of an organic acid,

H Example 1 ZZBqpart-s of, finely ground, monoacetylybenzigravity 1,15. slowly at 0-10-C. a solution of 7 parts of sodium nitrite in about 20 parts of Water and when the addition of this nitrite is complete the whole is stirred for about 1 hour and then filtered. Thefiltered. diese -solution. is run at 05 C. while stirring well into an exter -ially cooled. mixture. of 100 parts of stannousv chloride of. about 63. per cent;strength and 50 parts. of hydrochloricf. acid of specific. gravity 1.15.

The hydrazine thus formed is sparingly soluble.

After stirring for about 12 hours the mixture is filtered and the solid matterwashed with dilute hydrochloric acid and then with water. Byfstirring. this solid matter, if desiredaiter'separation,

of the tin, with dilute alkali the free hydrazine of the formula NHPNH -QONH. o 0 on,

is obtained. From alcohol it crystallizes in the form of bright yellow needles of melting point 227 0. Alternatively the filtered diazo-solution is run whilst stirring into a mixture of 632 parts of bisulfite liquor of 40 per cent. strength, 30 partsof sodium carbonate and 50 parts of caustic soda solution of 36 B. Stirring is continued during the night and the product is salted out and filtered. The filter cake is stirred into 2000 parts of water and after addition of 60 parts of acetic acid the whole is heated to boiling. There are then added gradually about 60 parts of zinc dust and boiling is continued until the mass is decolorized. After filtering hot the hydrazine sulfonic acid of the formula ems-nn-nn-OOnmcocH.

is salted out from the cool filtrate.

The hydrazine sulfonic acid can be converted into the hydrochloride of the hydrazine base by treatment with hydrochloric acid.

In like manner products can be prepared from the parent materials indicated in the 5th paragraph of this specification.

Example 2 The hydrazine hydrochloride of the formula HOl-NHr-NH-O-O-NH. o 0.011:

obtainable as described in paragraphs 1-3 of Example 1 is boiled together with 500 parts of water and 100 partsof hydrochloric acid of specific gravity of 1.15 for about 2-3 hours, whereby the hydrochloride is dissolved. If desired the solution may be treated with sulfurated hydrogen to remove tin, if necessary, filtered and. cooled. The large part of the hydrochloride separates and a further quantity may be salted out from the mother liquor or the latter may be treated with alkali to recover the free base.

This base may be recrystallized from alcohol when it forms white crystals of melting point 179 C. which become brown on exposure to air and correspond with the formula The corresponding product from mono-acetylortho, ortho-tolidine crystallizes from alcohol in which laminae of melting point 184 C. It has the formula CH3 CH:

Example 3 mixture is boiled for about 1 hour.

24.1 parts of the hydrazine of Example 1 are dissolved in about 200 parts of alcohol mixed with some glacial acetic acid. There are then added 14 parts of ethylaceto-acetate and the After cooling there are added to the mixture 20 parts of caustic soda solution of 36 B. and the mixture is stirred for 24 hours. By heating the larger part of the alcohol is expelled while water is substituted, the whole is filtered and pyrazolone precipitated by adding acid. It corresponds with the formula ter, ethyl oxal-acetate or the sodium compounds thereof may be used.

Example 4 27.2 parts of the hydrazine hydrochloride of Example 2 are suspended in hot water. Condensation follows with 14 parts of ethylacetoacetate at about 60 C. with gradual neutralization of the acid liberated in the condensation. When the condensation is complete the whole is cooled, made alkaline to phenolphthalein by means of caustic alkali, stirred for 12 hours, heated until everything has been dissolved and finally the pyrazolone precipitated by neutralization. It corresponds with the formula L D QO This new product is a white powder of melting point 194 C., soluble in dilute caustic soda solution and dilute mineral acid.

Example 5 30.7 parts of l-phenyl-(4-phenyl-4-acetylamino) -3-methyl-5-pyrazolone of the formula obtainable as described in Example 3 are dissolved in about 500 parts of water containing 10 parts of caustic soda solution of 36 B. and 15 parts of calcined sodium carbonate.

The filtered solution is mixed gradually with the diazo-compound from 17.5 parts of sulfanilic acid. When coupling is complete the whole is heated and the dyestuif salted out and isolated as usual. It is an orange-yellow powder and dyes cotton yellow tints. The dyestuff corresponds with the formula moi-ON N CH 0 By substituting for the diazotized sulfanilic acid of this example another diazo-component further direct dyeing dyestuffs may be obtained. By using non-sulfonated diam-compounds valuable pigments are formed while when an orthohydroxyor -ortho-carboxy-diazo-compound is N-OONHcoom used dyestuffs which can be metallized are produced. I

Thus, for example the .dyestuff from 'diazotized sulfoanthranilic acid and l-pheny'l-t l phenyl- 4"4acetylam'ind) -3 methyl 5-pyrazolone produdes yellow tints/on. viscose artificial silk or natural silk which become fast to light when after-treated with copper. The copper compound-"of the dyestufi dyes itself cotton yellow tints.

Further products dyeing yellow to brown-red tints are obtained by replacement of the sulfoanthranilic acid by ortho-aminophenol-sulfonic acids of the benzene or naphthalene series, such as sulfo amino-salioyclic acid, 4-chloro-2- aminophenol-G-sulfonic acid, 4-nitro-2-amino phenol-G-sulfonic 1 acid, l-amino Z-hydroxynaphthalene 4-sulfonic acid, 2-amino-1-hydroxynaphthalene- 4:8-disulfonic acid, etc., and

:conversion of the new azo, dyestuffs into :their copper compounds.

Similar dyestuffs can be obtained by replacing the l-phenyl (4'-phenyl-4"-acetylamino .3- methyl-S-pyrazolone by the corresponding 1- phenyl l phenyl-"-acetylamino) 5-;pyrazolone-3-carboxylic acid. Further, the 4"--acetylamino group can be replaced by an amino group which is substituted by another organic acid .radical. Such .ac'id radicals may be radicals of monoecarboxylic acids, such as propionicacid, "butyric acid, capric acid, benzoic acid, cinnamic stuffs'ofthe general formula may also take place according to known methods.

Such dyestuifs are for example thedyestufisor the copper complexes .:of the dyestuifs of the following formulas:

m w a l 3 aw a N n C nau Ju H N C O m 0 w M a N H N B 9 2 N H I N C 0 n N C C' G m a c o c n H N 0 w N H a. m o w 0 E 6 s w 5 w M BOIH SOaH- COOH t s w .n C w Sh .md y me. tn 2 mn n em W mw m iu WM 8M w a. am m 0m k e C ne W r Ha e 1 v y .m m N 0H0 mmd vw ne M r c w n m fl c N me e a w %m N r r fi w f. R Mu t Si. EH dm m nim Sne m t. .mIm sgm T g $.ma w a m pare also the last paragraph of Example 1 and v Thus,

SOxH

yields on cotton yellow tints. The complex copper, chromium, nickel and cobalt compounds of Examples of the last paragraph of Example 3. such dyestufis are:

COOH

this dyestufi yield also yellow tints oncot'ton. The iron compound yields brownish yellow tints. The copper compound 'of "the dyestuff of the wherein the I I tainswtat least twice and not more than three;

'fQrmum I group does not belong to the heterocyclic radical x CH! I I CH3 =N I N=C 0H 503151 l i tt H J) 0 1 g som I H is an orange-brown powder p dyeingt; the 'flber which is linked at t. gvlce to phenyl groups by orange-brown tints, and the dyestufi of the I k m e Q Q group's, stands for the radical of a mono-azo I e I, :2 0 1 1, V I l-C-N=N 1 t t I N= A is a brown-black powder dyeing the fih'er claret dyestufi, andin which general formula further tints. p i 'the groups I I A 'further strong dyeing dyestufi can be promm duced as follows: 59.1 partsof the dyestufi, from" I a I 4 14:}; I dia'z'otized dehydrothiotoluidine sulfonicacid'and vt .1 V; ml-phenyl (4'-phenyl 4"-amii1o)-3-methyl-5- p and T "1 '3 1 pyrazolone' are'tre'ated 'inthe 'usual manner with R-N =N-'oH--o o H phosgene. When the reaction is complete the I I (1 dyestufi formedis isolated. v g: gig' g g dyes cellulose fibers standfin another than in ortho position to one h claim another, which dyestufis are yellow to brown I I I I I and blackpowders dissolvingin water to yellow complex meta-1 9 of the to orange, to brown, to blackish and to green- 40 funa'ted a'IZO dyestuffs contammg at'leastIone solutions and dyeing the fiber similar tints of group d c rresponding to the general formula good fasness y '2. "The-complex copper compounds of the sull A fonated a'zo dyestuffs containing at least one-azo- I I group and corresponding to the general formula -45 R-N=N-oHo n H v v I t c= /\1 h h R t ride for a nucleus elected from Q I Z UATTAFN*RL inwic sa I s the group consisting of aromatic'nuclei of the N f H I v benzene and naphthalene series which is substi- 0 tuted in ortho-position to the -N'=N+ group p v I v v by a substituent selected from the group -con- I n in which R stands for a nucleus selected frame-= ig of OH and fla fi g the group consisting of aromatic nuclei of the o e group cons1s mg 0 me y P benzene and naphthalene series which issubsti- COOH-and COO- alkyl, xstands for a member of tuted in ,o-rthmposition the group the group of linkages consisting of a diphenyl link' by a substituent selected from the group coni5 :3 35 CI I=CH CHZ CH2 sisting of OH and COOH, y stands for a meniben of the group consisting of H, methyl, phenyl, N-0-N- COOH and COO alkyl, x stands for a member of I; 1 H I the group of linkages consisting of a diphenyl linkage, O--, S, -CH= CH--, CH2-- and a heterocyclic six-membered ring consisting I of at least 3 and not exceeding 4 carbon atoms, 0 N N 0 N and at least 2 and not exceeding t, nitrogen atoms, I I f not more than 2 nitrogen atoms standing adja- H H H cent to each other, which ring further contains I at least twice and not more than three times and heterocycllc s e bf llng fionslstlngwm t atomgrouping of at least 3 and not exceeding 4 c'arbon'atoms,

' land at least 2 and not exceeding 3 nitrogen atoms, not more than 2 nitrogen atoms standing 1!! adjaden'tto each other, which ring further coni "i7! times the atom grouping -NC/ I H N-- wherein the group does not belong to the heterocyclic radical which is linked at least twice to phenyl groups by groups, R1 stands for the radical of a mono-azo dyestufi, and in which general formula further the groups stand in another than in ortho-position to one another, which dyestuffs are yellow to brown and black powders dissolving in water to yellow to orange, to brown, to blackish and to green solutions, and dyeing the fiber similar tints of good fastness.

3. The complex metal compounds of the sulfonated azo dyestuffs containing at least two azogroups and corresponding to the general formula in which y stands for a member of the group consisting of H, methyl, phenyl, COOH and COO alkyl, R stands for a nucleus selected from the group consisting of aromatic nuclei of the benzene and naphthalene series which is substituted in ortho-position to the N=N group by a substituent selected from the group consisting of OH and COOH groups, and R1 stands for the radical of a mono-azo dyestuff, which dyestuffs are soluble in water to yellow, orange and brown solutions and dyeing the fiber similar tints which can be after-treated with copper.

4. The complex copper compounds of the sulfonated azo dyestuffs containing at least two azogroups and corresponding to the general formula in which 1/ stands for a member of the group il l ri anconsisting of H, methyl, phenyl, COOH and 000 alkyl, R stands for a nucleus selected from the group consisting of aromatic nuclei of the benzene and naphthalene series which is substituted in ortho-position to the -N=N group by a substituent selected from the group consisting of 0H and COOH groups, and R1 stands for the radical of a mono-azo dyestuff, which dyestufis are soluble in water to yellow, orange and brown solutions and dyeing the fiber similar tints which can be after-treated with copper.

5. The complex metal compounds of the sulfonated azo dyestuffs containing at least two azogroups and corresponding to the general formula and a heterocyclic six-membered ring consisting of at least 3 and not exceeding 4 carbons atoms, and at least 2 and not exceeding 3 nitrogen atoms, not more than 2 nitrogen atoms standing adjacent to each other, which ring further contains at least twice and not more than three times the atom grouping A N- wherein the group does not belong to the heterocyclic radical which is linked at least twice to phenyl groups by groups, and in which general formula further the groups stand in another than in ortho-position to one another, which dyestuffs are yellow to brown and black powders dissolving in water to yellow to orange and to brown solutions, and dyeing the fiber similar tints of good fastness.

6. The complex copper compounds of the sulfonated azo dyestuffs containing at least two azogroups and corresponding to the general formula in which R and R1 stand for nuclei selected from the group consisting of aromatic nuclei I of the benzene and naphthalene series which are substituted in ortho-posit'ion to the N=N group by a substituent selected from the group consisting of OH andfCOOI-I, y stands for a member of the group consisting of H, methyl, phenyl, COO-H and COO- alkyl, :1: stands for a member of the group of linkages consisting of a diphenyl linkage, O-, --S-, CH=CII--, CH2-CI-I2,

and a heterocyclic"six-membered ring consisting I of at least 3 and not exceeding 4 carbon atoms, and at least 2 and not exceeding 3 nitrogen atoms, not more than 2 nitrogen atoms standing adjacent to each other, which ring further contains at least twice and not more than three times the atom grouping wherein the group does not belong to the heterocyclic radical stand in another than in ortho-position to one wherein R stands for anaromatic nucleus sected from the group consisting of nuclei of the benzene and naphthalene series which is substituted in ortho-position to the --N=N group by a substituent selected from the group-consisting of'OI-I and (1001-1 groups, and :1 stands for a member of the group vconsisting of H, methyl, phenyl, 0001-1 and COO- alkyl, which dyestuffs are yellow to orange and brownish powders dissolving in water to similar solutions, and producing on cotton similar tints.

8. The complex copper compounds of the sulfonated azo dyestuffs of the general formula wherein R stands for an aromatic nucleus selected from the group consisting of nuclei of the benzene and naphthalene series which is substituted in ortho-position to the -N:N group by a substituent selected from the group consisting of OH and COOI-I groups, and y stands for a member of the group consisting of H, methyl, phenyl, 0001-1 and COO alkyl, which dyestuffs are yellow to orange and brownish powders dissolving in Water to similar solutions, and producing on cotton similar tints. ,1

9. The copper compounds of the sulfonated azo dyestufis of the general formula l-N=NR 4% 1'1 wherein R stands for an aromatic nucleus of the benzene series which is substituted in orthoposition to the N=N-- group by a COOI-l group, and y stands for a member of the group consisting of H, methyl, phenyl, COOH and COO-- alkyl, which dyestuffs are yellow to brown-yellow powders dissolving in water to yellow solutions, and producing on cotton yellow tints.

10.'The copper compound of the dyestufi of the formula 11. The copper compound of the dyestufi of the formula BOzH 

